Define a worker process and endpoint to send invitations PDF via email

app/controllers/invitations_controller.rb

@@ -26,6 +26,12 @@ class InvitationsController < ApplicationController
     end
   end
 
+  def email
+    AdminMailer.with(wedding_id: ActsAsTenant.current_tenant.id).invitations_pdf_email.deliver_later
+
+    head :ok
+  end
+
   def sheet; end
 
   def show

app/mailers/admin_mailer.rb

@@ -5,14 +5,41 @@
 class AdminMailer < ApplicationMailer
   def attendance_change_email
     @guest = Guest.find(params[:guest_id])
-
-    mail(
-      to: @guest.wedding.users.pluck(:email),
-      subject: I18n.t(
-        'admin_mailer.attendance_change_email.subject',
-        name: @guest.name,
-        status: I18n.t("active_record.attributes.guest/status.#{@guest.status}")
+    ActsAsTenant.with_tenant(@guest.wedding) do
+      mail(
+        to: recipients,
+        subject: I18n.t(
+          'admin_mailer.attendance_change_email.subject',
+          name: @guest.name,
+          status: I18n.t("active_record.attributes.guest/status.#{@guest.status}")
+        )
       )
-    )
+    end
+  end
+
+  def invitations_pdf_email
+    ActsAsTenant.with_tenant(Wedding.find(params[:wedding_id])) do
+      invitations = Invitation.includes(:guests).all
+
+      pdf_html = ActionController::Base.new.render_to_string(
+        template: 'invitations/sheet',
+        layout: 'pdf',
+        locals: { invitations: }
+      )
+      pdf = WickedPdf.new.pdf_from_string(pdf_html)
+
+      attachments["invitations_#{Time.current.strftime('%Y%m%d_%H%M%S')}.pdf"] = pdf
+
+      mail(
+        to: recipients,
+        subject: I18n.t('admin_mailer.invitations_pdf_email.subject')
+      )
+    end
+  end
+
+  private
+
+  def recipients
+    ActsAsTenant.current_tenant.users.pluck(:email)
   end
 end

app/views/admin_mailer/invitations_pdf_email.html.erb

@@ -0,0 +1,7 @@
+<%# Copyright (C) 2024-2025 LibreWeddingPlanner contributors %>
+
+<p><%= I18n.t('admin_mailer.greeting') %>,</p>
+
+<p>
+  <%= I18n.t('admin_mailer.invitations_pdf_email.paragraph_1') %>
+</p>

app/views/admin_mailer/invitations_pdf_email.txt.erb

@@ -0,0 +1,5 @@
+<%# Copyright (C) 2024-2025 LibreWeddingPlanner contributors %>
+
+<%= I18n.t('admin_mailer.greeting') %>,
+
+<%= I18n.t('admin_mailer.invitations_pdf_email.paragraph_1') %>

config/locales/en.yml

@@ -17,3 +17,6 @@ en:
       subject: "%{name} has changed their attendance status: %{status}"
       paragraph_1: "The guest %{name} has changed their attendance for the wedding."
       notify_on_updates: "You will be notified of any further changes to their attendance status."
+    invitations_pdf_email:
+      subject: "Your wedding invitations are ready"
+      paragraph_1: "Your wedding invitations are ready. Please, find them attached to this email."

config/routes.rb

@@ -42,7 +42,9 @@ Rails.application.routes.draw do
 
     resources :tables_arrangements, only: %i[index show create]
     resources :summary, only: :index
-    resources :invitations, only: %i[show index create update destroy]
+    resources :invitations, only: %i[show index create update destroy] do
+      post :email, on: :collection
+    end
 
     root to: redirect("/%{slug}")
   end